Replacing several missing teeth

Implant count rarely matches tooth count

This is the single most common misunderstanding people arrive with. If four teeth are missing in a row, the assumption is that four implants are needed — and that the cost will scale accordingly. In practice, an implant-supported bridge is often planned with two implants at the ends carrying the restoration between them.

How many implants a case needs is a structural question. It depends on where the gap is, how much chewing force that part of the mouth handles, the quality and volume of bone at each potential site, and the length of the span. A dentist works this out from imaging, not from counting gaps.

Where the implants go is as important as how many

Position is determined by two things pulling against each other: where the bone can actually hold an implant, and where the finished teeth need to sit to look right and meet your bite correctly. Digital planning exists largely to reconcile those two constraints before anything is placed, rather than discovering a conflict during treatment.

This is also why an implant is sometimes placed in a position that does not correspond exactly to a missing tooth. The restoration above it can be shaped to bridge the difference.

Gaps in different parts of the mouth

Several missing teeth on one side often affects chewing more than appearance, and people adapt by favouring the other side. That habit can lead to uneven wear and jaw discomfort over time, which is a reason dentists raise treatment even when the gap is not visible.

Gaps that are not adjacent — one missing here, two missing there — are planned differently again, sometimes as separate restorations rather than one bridge.

Compared with a partial denture

A removable partial denture is generally quicker and less expensive to provide. It rests on the gums and clasps onto remaining teeth, is taken out for cleaning, and can move slightly during eating. Some people get on with one perfectly well.

Implant-supported restorations are fixed and do not rely on clasps, which many patients find more stable. They require surgery, take longer, and cost more. Neither option is universally better — it depends on what matters to you, what your mouth will support, and your budget.

When existing bridgework is failing

A common reason people look into implants is that an older bridge has failed, often because one of the teeth supporting it has decayed underneath. If that tooth cannot be saved, the span gets longer and the remaining support weaker. At that point a dentist may discuss implants as a way to stop relying on teeth that are already compromised.